import pandas as pd
index = ['王蒙','李珊','赵胜','刘文']
columns = ['语文','数学','英语']
dict = {'语文',:[110,95,98,112],'数学':[120,110,80,106],'英语':[105,108,100,97]}
df1 = pd.DataFrame(dict, index)
print('使用字典创建的DataFrame对象df1:\n',df1)
s1 = pd.